ADU Construction in Glendora
Glendora ADUs planned for mapped fire hazard zones, with cleared ground around the new unit, ember-resistant vents and noncombustible walls.
Does the cleared ground around our house now have to reach the backyard unit as well? On a first Glendora visit that question leads straight to the hazard map, because the state's maps put a number of Glendora parcels inside fire hazard zones, and building on one of them brings ember-resistance rules. Clearance rules generally look at each building on its own, so a new unit gets its own band of cleared ground.
Clearing around a second building
Near the walls, the first band of ground stays free of anything that burns easily: dry grass, bark mulch, wood piles and dead branches. Farther out, plants are spaced and trimmed so a fire on the ground cannot climb into tree crowns. Fences, sheds and stacked lumber close to the unit count as fuel too. We place the unit where its cleared band overlaps the house's as much as the lot allows, which keeps the cleared area compact and leaves more of the yard for planting that is kept green and spaced.
The shell under the code
In a mapped zone, the unit's exterior follows the wildfire chapter of the building code. Siding is noncombustible or ignition-resistant, windows carry tempered glass in at least one pane, and every vent carries a listing for ember and flame resistance. The roof takes a Class A covering with the eaves boxed in or built with noncombustible soffits, and the gutters get metal guards. Decks and stairs attached to the unit use ignition-resistant materials. Each item appears on the drawings, so the reviewer can check it against the code.
ADU Construction in Glendora: common questions
Where a Glendora parcel lies inside a mapped zone, yes: the wildfire chapter sets requirements for siding, windows, vents, roofing and decking. We check the address against the state map before design, and we build the unit with that same hardened exterior even when the parcel falls outside it.
The vent schedule and tempered glazing notes for a mapped Glendora parcel sit on the wall drawings, and the site plan shows the cleared band around the unit. Package drawings cover one story within the size cap, and anything larger is quoted separately.
On a mapped Glendora lot, raising the unit with the rebuilt house means both get the same hardened exterior and one clearance plan covers the whole yard. It depends on room for both footprints and on the city's approval of the order, and we measure the spacing before drawing either.
More work we do in Glendora
Plan your project in Glendora
Tell us about the house and the adu construction work. We reply about a walk-through and a written scope.